Steam-hammer



Umrnn sr'n'rns PATENT onirica.

LEWIS KIRK, OF READING, PENNSYLVANIA.

STEAM-HAMMER.

Specification of Letters Patent No. 5,774, datedSeptember 19, 1848.

ication, in which- Figure l is a plan with the steam cylinder and steam chest in section; Fig. 2, a side elevation with the steam chest' and valve in section; and Fig. 3, a cross vertical section taken at the line m) of Fig. 2.

The modifications of my improvements are represented in other figures to which ref.

erence will be made hereafter.

The same letters indicate like parts in all the gures.

The invention which I now claim is for improvements on a steam hammer secured to me by Letters Patent bearing date the third day of April 1847.

The iirst part of my present invention consists in arranging a horizontal steam engine in combination with the helve or handle of a hammer by means of an arm and a jointed link or its equivalent to vadopt the rectilinear movement of the piston rod to the curvilinear movement of the arm with which it is connected, by means of which arrangement and combination the engine can be located more advantageously than by any other arrangement with which I am acquainted. And the second part of my present invention consists in operating the valve which governs the steam and exhaust ports for the admission and discharge of the steamv by means of an arm so placed on the stock or trunnions of the hammer helve, as to admit of adjustment during the operations of the hammer for the purpose of governing the admission and discharge of the steam to regulate the strength and range of the blows of the hammer.

In the accompanying drawings (a) represents a bed plate and (b, b) two standards provided with appropriate boxes in which work the journals of two trunnions (c, c) of the stock (al) to which the hammer helve e) is attached. This stock (el) has an arm if) that .extends down at right angles with jointed. a link (g) the other end of which in turn is'jointed toa sliding crosshead (71,) on the end ofthe piston rod (i) of a horizontal the helve, and to the lower end .thereof 'is steam cylinder (j) properly secured to the l bed plate,fso that as the steam piston (7c) reciprocates wit-hin the cylinder it communi- Cates a vibratory motion to the hammer, the jointed link (g) that forms the connection between the piston and the arms o-f the he'lve stock admitting of the necessary play to' follow the lcurves of the vibration of the said arm'. This arm should be so located relatively to the cylinder and piston that when the piston is at the back end of the `'cylinder the piston rod and jointed link shall be at right angles with the arm that the le-v verage of the said arm may then be at its greatest length to overcome the inertia of the hammer and other parts connected therewith at the time of starting.

On the trunnion (o) of the helve stock there is another arm (Z) adapted to turn there-on. The lower end of this arm lies within a slot (m) in the rod (a) of a slide valve (0) of the usual construction, and the slot in the valve rod should be about double the length of the thickness of that part of the arm that lies in it, so that the hammer may be elevated some distance before the arm will begin to move the valve rod. This play of the arm within the valve rod is with the view of giving the steam freely to the engine during the commencement of the motion of the hammer, and of course the length of this slot relatively to the size of the arm that lies within it must be determined by the judgment of the constructor in view of the range which he desires to give to the han'nner. The valve rod should, as is usual in such apparatus, Work through a stuffing box (79) in the end of the steam chest (g) and through a guide (7'). The steam valve (s) commands the exhaust port and two steam ports (t, t) located and arranged in the usual manner that steam may be admitted alternately at both ends of the cylinder at one end for the purpose of elevating the hammer, and at the other to force it down, and thus aid its gravity in striking the blow. If however it be desired to depend on the gravity of the hammer alene for striking the blow the steam chest should have only the steam port that communi- Cates with the rear end of the cylinder for the purpose of elevating the hammer and the exhaust port to permit the hammer to descend by gravity.

That part ot the arm (l) Which passes around the lrunnion (0') is provided top With a segment rack (u) the cogs of Which engage with the threads of an endless screw (fu) that has its bearings in tWo brackets (w, w) on the helve stock; and the spindle of this screw is provided With a handle by ,which the attendant can turn it when desired for the purpose of changing the position oi the arm (l) relatively to the arm f) with the View of varying the position of the valve relatively to the ports inthe Steam chest and thus cause it to give more or less steam as the condition oi the Werl; may require a lighter or heavier flow.

It will he obvious that the first part of my invention can he varied in some partineulars Without changing the essential principle. of my invention, as for instance, instead of the jointed link that forms the connection between the piston rod and the arm" (f) ofthe helve stock, the piston rod itself may be connected directly with the piston rod hy substituting instead a vibrating engine as represented in the accompanying Fig. 4, the Cy qiiiiei i@ Strike always with the Same force, 1 by S11-ie a commen .Slide 0,1 any other 'kind at valve.

Wint I Qieiiii iiiy invention, and desire i0 Secure by Iiiieie Baisse. iS-

Coiiibiiiiiig a heiizeiltal steam engine with ih@ belve of fi hammer by means of an firm iiiiii iQiIiied lilik, @i iis quivalent Substantiaily iieieiii fiesiihed- LEWIS KIRK. Witnesses;

' Cetes- Gf Rami, Wiiiieii Bisi.' 

